Fuel-coolant system



N. M. JONES FUEL' COOLANT SYS TEM Filed July 16, V1942 l 2 sheets-sheet1 Patented Nov. 2 4, 1942 UNITED STATES l PATENT YoFFlcls FUEL-COOLANTSYSTEM Nelson M. Jones, Sarasota, i Application July 16, 1942, .SerialNo. 451,201

2 Claims. This inventionrelates to a system wherein an internalcombustion engine is cooled by the passage of fuel from the liquid tothe vapor state,

-and particularly such as liquid petroleum gases and usually butane, orpropane.

A particular object of the present invention is to provide an effectivesystem or means of the flooded, type wherein a predetermined quantity ofthe fuel is maintained within a cylinder jacket of the engine and vaporfrom such fuel above the predetermined level passes to the mixing valve.

It isalso aimed to provide in combination eil'ective means to controlthe aforesaid predetermined fuel liquid. level as by means of athermostatlcally actuated -inlet valve or a oat control inlet valve. P v

control of an inlet valve Il and exhaust gia-.sesl

pass from the cylinder'through a-manifold Il under control of a valve20.

Valve i2 may or may not be of the expansion type. It has therein a valvemember controlling a seat through which the fuel passes and which valvemember is operable by a diaphragm con' trolled by a column of liquidcontained in a tube 2| and in a terminally equipped thermostatic'bulbVarious additional objects and advantages win 1 become apparent from aconsideration of the description following taken in connection withacbodiments.

companying drawings illustrating operative em- In said drawings: Figure111s a .view in central vertical section,

primarily, through an engine embodying my improvements:

Figure 2 is an enlarged central vertical section through the mixingvalve;

Figure 3 is a central vertical section through a modied form of theinvention, and d Figure 4 is a horizontal section particularly showingthe float control inlet valve.

Referring specifically to the drawings wherein like reference charactersdesignate like or similar parts and rst to the form of Figures 1 and 2,a fuel'supply tank is shown at I0 adapted to contain liquid petroleumgases as a liquid, and particularly butane or propane or any otherliquid or material which produces a refrigerating effect when it passesfrom theliquid to the gaseous state according to the principleforinstance gov- 22, the latter being fastened in the jacket ofthe engineas shown at 23, relatively close to the predetermined level for theliquid fuel as suggested by the dot-dash line at 2l. Vapor from theliquid fuel above the level 24, .will pass into a pipe or conduit 2'5,conveying it to the lower end of an expansion valve 26l arranged incommunication with the intake manifold- I1.

so regulated that a certain height or predetermined level of liquid,fuel, namely* that at 2|, can be maintained in the jacket space Il.vSuch level will leave a vapor space within the space Il erning theoperation of the structures of Letters Patent #2,234,900 and #2,244,623.issued to me. 'I'he liquid fuel passes by gravity from` the tank l0through a supply pipe Ill through an inlet or expansion valve l2 andunder control of the latter through a short pipe II into the interiorspace of a jacket I4. surrounding a cylinder Il! of an internalcombustion engine. Of course, the prinber of cylinders. thesinglecylinder shown being by wayof example only. A piston Il operatesuse of a float valve as in Figures 3 and 4, which yciple may bepracticed in connection with an ini tei-nal combustion engine regardlessof the numin the cylinder Il in the conventional manner to operate theengine, and carbureted fuel is adapted above the fuel so that it may betaken 011 by pipe 25 and used for fuel purposes.v As the gas is drawnoil by pipe 25 for use as fuel in the engine, the fuel in theJacket-boils or produces more vapor by evaporation as the level of suchfuel` liquid lowers. 'Ihe loweringlof the liquid opens the valve l2until the liquid level again raises to the bulb 24 and .into contacttherewith.

The same results will be accomplished by the replaces the valve I 2 andits thermostatlc control. The same parts which are used in Figures 1 and2, bear the same reference numerals in Figures 3 land 4. In suchmodified form. an enlargement or chamber 3 0 is provided on the Jacketof the cylinder whose interior provides a float space 3|. The chamber3i) at the outer end is closed by a removable plate I2 which mounts aconnection consisting of interior and exterior parts l33 and 34,detachably secured together and to the plate by screw threads at 35.' Afuel supply pipe Il connects tothe exterior part 34 and within the boreof the part 33. a perforated Such expansion valve 26 has an air inlet at21 under control of a valve seat IB is disposedY whose perforation isunder control of s needle valve I1. At the inner end needle valve l'lhas s block Il pivoted therepivoted on a. horizontal exis Il to e leverIl pivoteclon'everticalexisattoeleverA which is pivoted on, e horizontalai; u to the interior part u. A rod Il is connected in level'anditcarriessilostoperatinzinthespace 3|. The vapor from the iuel in theJacket space il above the predetermined level 2l is utilized es exactlyin the preceding form of the invention,

'lndassuchlevelllrecedestheiioetlowersin order to proportionatelyretract the valve I1 from its seat permitting additionalllquid fuel toenterthespace Mmdsgainreisetheostend sctuete the partto close the needlevulve I1. .As

the liquid level 24 raises and lowers. the tuel in space I4 will boil toproduce the vapor for utilization es fuel, as described with respect tothe tint form of the invention.

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